The PIN property is an authentication property that defines a personal identification number (PIN) for the card. The default PIN that is created on the card is $$$$java. Either you or the user can change $$$$java to a personalized PIN. Consider giving all users at your site the same default PIN name: changeme, for example. Then make sure each user changes the PIN to a value that is known only to that user.
See To Change the PIN on a Card (Console) for step-by-step instructions on changing the PIN on a smart card.